Hardcoded ov7690 VGA dimensions, frame rate. small cleanups to code
added QVGA mode for ov7690
additional debugging messages for plugin
implemented workaround for late call to set_caps. will now stop capture, set caps, then resume.
fixed / clarified framerate and time_per_frame
finished first draft of mfw_v4lsrc for ov7690 on slimbook